Coffee-machine.



G. NELSON.

COFFEE MACHINE.

APPLICATION FILED APR 24,1907. 1 1 1 1 02% Patented Sept. 22, 1914;

Inventor all/L44 MM Attorneys.

THE AORRIS PETERS C0., PHOTO-LITHO, WASHING TON D. 1:.

same but taken atright angles to Fig.

ryin'gthe material from whichthe essence through th enter of the'screen 3i and stops ll terial contained in the screen" 8.

' I To all whom it mag concern:

No." 195 Plymouth 1 .fication.

if nated by the-same referencelcharacters.

onrrnn s ra'rns rarn orr cnciiannns Nii soN, or BROOKLYN, new roux, assionoaro s. srnmvau & 00., on NEW YORK, N. Y., A ooranrivnnsnir coivirosnn or SIGMUND sriinivau AND IoNEL STRASSBUBGER.

Be it known that-I, CHARLES NELSON, a subject of the King of Sweden, residing in theborough of Brooklyn, county of Kings and State of'NewaYork, post-office address street, Brooklyn, York, have invented an Improvement in Coflee-Machines, (Case 13,) of which the following is a specification. a The object'I have in view'is' to produce a .1 device for making infusions of coflee, and

for analogous purposesfwhich device will have no moving or loose parts, which will operate in a minimum of time, which will produce an infusion before all the water in the apparatus is 7 brought to a boil, and which can be readily cleaned andwillbe of cheap construction and durable in use j r I attain these objects by the mechanism illustrated in the accompanying drawings in whichi j 1 a Figurefl is asection'of a portion of a cofl'ee machine embodying my invention. Fig. 2 is a side View of thebottom portion of the percolator. Fig. 3is a view of the 2. Figj4 is a section on the linear eonof Fig; 3. Fig. 5 is a viewsimilar to FigQQ of 'a modi In all of theviewslike parts 'are desig In'carrying out my invention, 1 provide the usual receptaclehwhich carries a globe 2iat theupp'er par'tthereofl .Fromithe globe dependsthe screen 3, whichis used for caris tobe made. The percolator comprises a tube 4 and a tubular fitting 5 at the bottom thereof. The tube 4: is vertical and extends from the bottom of the receptacle 1' up b'elowa deflector 6, which is for the purpose of'receiving and scattering the liquidwhich is forcedup the tube 4: by the percolator,

and" scatter and sprinkle it over the maj The upper ma of the tubeis open. The tubular fitting rests within the chamber 7 which chamber is locatedbelow the bottom of the receptacle oorrnn-macninn.

Patented Sept. 22', 1914..

. 1; the upper end of the chamber is open and communlcates with the interior of the chamber. The chamber is circular in cross section and its capacity is small compared chamber is screw-threaded so as to engage with threads 8 on the tubular fitting 5. A flange 9 on the fitting makes a liquid-tight joint at that point. A plate 10, secured at the bottom of the chamber 7 is for the purpose of concentrating the heat from the spirit lamp or other device used for the purpose and prevent the bottom of the receptacle 7 from becoming heated.

The tubular fitting 5 extends .some distance down into the chamber 7 and makes a close fit therewith. An annular groove 11 is formed in the fitting intermediate'its ends, and thisgroove communicates with the vertical groove 12 which is cut through the threads 8 and flange 9.. Thisgroove does is thereby produced of the chamber 7 to the receptacle 1, which i not extend belowthe annular 1 groove 11. A spiral groove 13 is formed on that portion of thespiral groove 131 communicating directly with: the lower end of the vertical groove 12. In this modification also the vertical groove 12 does: not extend entirely through the flange 9, but only partially so,

the flange being somewhat thicker than that shown in the otier embodiment of'my invention. i l I prefer to make the upper part of the fit ting 5, above the flange 9, of some considinterlor of thereceptacle 1 by means of a annular groovell is om1tted,the upper end 1 to the receptacle. The upper portion of the New of the tubular fitting' below the annular sage formed in the r brought to such '1 meet' with will stand in the erable thickness as shown in Figs. 2 and 3, or else to make the flange 9 of some thickness. This is for the purpose of producing a heat insulator or jacket between the inside of the chamber and the receptacle 1.

The operation is as follows: The receptacle 1 is partially filled with water, and the screen 2*with coifee or other material of which it is desired to secure an infusion. Heat being applied to the bottom of the chamber 7 and a plate 10 will heat the water contained in the chamber. This water will have entered the'chamber through the pasvertical groove 12, annular groove 11 and spiral groove 13, and vertical groove 4 at the same level or slightly higher than the level of the liquid within the receptacle 1; The

diiference in the level between the liquid in e the tube 4 and receptacle 1 will be due entirely to capillary. action. The contents ofthe chamber 7 will now be heated, which will expand the liquid, and also produce steam below the liquid sufficient to drive the liquid up the tube 4 to the deflector 6, where it willbe sprayed and scattered over the contents of the screen 3. The liquid remaining in the percolator will settle back in the tube 4, other liquid will enter the bottom of the chamber 7 through the grooves 11,

' 12and 13, and the operation will be again repeated.

The size of the chamber is such that it is so' small that liquid will not circulate within it to anyextent before it has timeto be a degree of temperature that the liquid will be driven up to the tube 4;. The irregular passage formed by the grooves 11,: 12 andl3, is of such small cross-section and has so. many angles that the liquid will more resistance in being driven up-through such passage than being driven up thetube 4; consequently, the reater portion of the liquid driven-out oi the-chamber 7 will be driven up the tube 4:. .Thispassage may be defined as a labyrinth passage,

serving as it does as a bafliing device to prevent the ready traverse of liquid at high speed while permittingv it to freely enter the chamber from the receptacle. The thick metal forming the upper part. of the fitting or the flange 9 acts as an insulator and pre-i vents .thewater or. liquid in the bottom of the receptacle 1 from becoming heated.

By my device I have produced an apparatus formaking an infusion of cofi'ee or patent statutes,

other material which will have no moving parts,.which can bereadily cleaned by separating the fitting from the chamber, and which will be cheap to construct and durable.

In accordance'with the provisions of the I have described theprinciple of my invention, together withv the apparatus which I now consider to repre- 1 comprises a tube member-having a:vert1calv 'groove'on one sideandaaspiral, groove on;

grooves.

. chamber,

sent the best embodiment'thereof; but I desire to have it understood that the apparatus shown is merely illustrative and that the invention can be carried out in other Ways.

Having now particularlyv described the nature of my invention and in what manner thesame is to be perform and desire to secure by Letters Patent 1i s: 1. In a coffee machine, the combi .Qolatorwithin the chamber, the said cham-. her and percolator being interacting screw threads, a groove, and a passage being formed I across the screw threads.

ed what I claim .t on with a receptacle having an open ended chamber communicating therewith, of a persecured together by passage afiording communication between Tthe receptacle and. the-chamber, the ".said

2. A percolator fora cofi'eemachine which comprises a tube and a. member secured thereto, the said membenhaving a vertical groove and a spiral groove communicating therewith, the two grooves constitut' la 7 liquid passage incombination with aheating chamber which forms one wall! of the I passage.

3. A percolator and} a member secured thereto,] the said the other, and means forallowingcommu: nication between.

4. A percolator potlcomprisinga fora coffee m'achinewhich the vertical and; spiral- .al heating chamber, a percolator? chamber providingatortuous passage bfetween said main and heating chambers; v 5. In apercolator pot, a main chamber,-a

heating '1 chamber, into saidheatmg chamber,

structed ,asj to form {with the innerwall of said heating" chamber" a. between said-main and heating-chambers.

tortuous {passage 6. In a percolator pot, amain chamber-ta heating chamber, a percolatortube havin an enlarged lower end fittinginto's'aid heatfenlarged. end and chamber, said enlargement havingga, tortuous passage formed, in its outer wallto afford connnunication between said main, and heating chambers,.and having a recess forming a part. of said heatingchamber..-.=

1 0 5 a percolator tube fitting the ,outer wall of" l the lower end, of said tube being so-con-i B. in a percoiator pot, a main chamber, a tion with the inner Wall of said heating heating chamber appended thereto, a perchamber. 10 colator tube havin an enlargement on its This specification signed and witnessed lower end arrange to' fit into said heating this 22nd day of April, 1907. 5 chamber, said enlargement having a tortu- CHARLES NELSON.

ous groove formed on its outer Wall arranged Witnesses: Y a to form a communicatingpassage between J OHN S. LOTSCH, said main and heating chambers in conjunc- EDWARD IRMSCHER. 5

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, I). G. 

